<template>
<div v-bind:class="dynaimcClass">{{ msg }}</div>

</template>

<script>
export default{
    data(){
        return{
            msg:"HelloWorld",
            dynamicId:"appid",
            dynaimcClass:"appclass"
        }
    }
}
</script>
<style>
.appclass{
    color: red;
    font-size: 30px;
}
</style>